Drill bit



Oct. 29, 1929. McN l 1,733,311

Filed 001;. 24, 1928 Patented Oct. 29, 1929 UNITED STATES PATENT OFFIQEJAMES S. MCNEILL, OF WEWOKA, OKLAHOMA, ASSEGNOR OF ONE-HALF TO PHILLIPI-I. LTVELY, OF WEWOKA, OKLAHOMA DRILL BIT Application filed October 24,1928. Serial No. 314,694.

The present invention relates to improvements in earth boring implementsand has reference more particularly to a drill bit wherein horizontallydisposed rotatable cutters extend from the body of the bit at a pointabove the vertical cutting element for the purpose of enlarging the holethat is being drilled.

One of the important objects of the present invention is to provide adrill bit of the above mentioned construction that will at all times bepositive and ellicient in its operation, the parts being further soarranged as to permit the same to be readily and easily assembled ordisassembled whenever necessary.

Still a further object is to provide a bit of the above mentionedcharacter, which is simple in construction, inexpensive, strong anddurable, and further well adapted to the purpose for which it isdesigned.

Other objects of the invention will become apparent as the nature of theinvention proceeds and when taken in connection with the accompanyingdrawings, forming a part of this application.

In the accompanying drawing, wherein like reference characters designatelike parts throughout the several views:

Figure 1 is an elevational view of the drill bit embodying my invention,showing the same in the act of drilling a well.

Figure 2 is a view showing the complementary sections of the body of thebit disassembled and looking at the inner faces thereof.

Figure 3 is an enlarged detail of one of the units forming a salientpart of the present invention that is employed for the purpose ofenlarging the well that is being drilled, and

Figure l is a transverse section, taken approximately on the line 44 ofFigure 1.

In the drawing, wherein for the purpose of illustration is shown thepreferred embodiment of my invention, the numeral 1 designates generallymy improved drill bit, the same comprising a sectional body thatincludes the complementary identical sections 2 and 3, respectively.Each of the semicylindrical sections is formed at its upper end with thethreaded portion 4 and a reduced threaded neck 5 extends upwardly fromthe upper end of each section. The complementary neck portions of thesections, when the latter are litted together are secured within asuitable socket 6 to provide a means for connecting the upper end of thecomplementary sections together, and the socket member is formed on thelower end of a suspension member 7. The lower end portions of thecon'iplementary sections are detachably secured together through themedium of screws 8 that extend through openings formed in one of thesections with the threaded ends of the screws being threaded in thethreaded openings formed in the other sections.

A cutting element 9 of any conventional construction is disposedvertically in the lower end portion of the sectional body with the lowerportion of the cover projecting beyond the lower end of the body of thebit for forming a hole of a predetermined size, as is well known in theart. The sectional body is formed with a fluid conducting passage thathas communication with a similar passage 10 formed in the socket member6 for a purpose also well known in the art, the complementary fluidpassage is formed in the sections of the body being shown at 11 and 12respectively, with reference more particularly to Figure 2.

The opposed faces of the complementary sections of the body arechanneled as at 18, and the upper and lower ends of the channeled outportions are formed with sockets 14 and 15 respectively as alsoillustrated in Figure 2, for a purpose to be presently described. Theouter sides of the channeled out portions 13 terminate at the outer sideedges of the complementary sections.

A cylindrical block 16 is removably fitted within each pair of opposedcut-out portions 13 and trunnions 17 and 18 project from the upper andlower ends of each of the cylindrical blocks as indicated very clearlyin Figure 3. The trunnions 17 are received in the respective sockets 14,whereas the lower trunnions are receivable in the lower socket 15, andwhen the sections of the body of the bit are clamped together, thecylindrical blocks and the trunnions associated therewith will bepositively held in position between the sections of the body againstcasual displacement therefrom.

The manner in which the cylindrical blocks are positioned in thesectional body of the bit is clearly disclosed in Figure l. Eachcylindrical block is formed adjacent its lower end with a transversebore 19, the inner end portion of which is enlarged as at 20, and aspindle 21 extends through the bore 1 A conical shaped head 22 is formedon the outer end of the spindle while the inner extremity thereof isthreaded for receiving the nut 23 that will be confined within theenlarged portion 12 of the bore 19, and a cotter pin 24: extends througha transverse opening formed in the inner threaded end of the spindle toretain the nut 23 on the spindle against displacement therefrom.

A cutter unit is rotatably and detachably secured on the conical shapedhead 22 and this unit includes a substantially conical shapet socketmember 26, the larger inner end there of being opened and thissocketmember is of a length greater than the length of the conical head22, so that when the socket member is positioned on the conical head,the internally threaded inner end portion of the socket member 26 willproject beyond the shoulder formed at the juncture of the head 22 withthe spindle 21 and an externally threaded locking ring 27 encircles thespin dle 21 and cooperates with the internally threaded portion of thesocket member 26, to secure the same against displacement from theconical head 22.

Formed on the outer face of the rotatable socket members 26 are thecutting teeth 28, and these teeth may be arranged in any predeterminedmanner.

It is of course to be understood that the cutter unit 25 is positionedon the conical head 22 and the spindle 21, prior to the positioning ofthe spindle within the bore 10 of the cylindrical block 16, and thelocking ring 27 will engage with the shoulder formed at the juncture ofthe conical head with the spindle to prevent outward sliding movement ofthe socket member 26 with respect to the tapered head 22, in a mannerreadily obvious from the construction shown in Figure 3.

l he cutter units 25 are disposed on opposite sides of the sectionalbody and are adapted for rotation on a horizontal axis at right anglesto the axis of rotation of the drill bit, the threaded portion l of thebody ail'ording a means for connecting the bit to the lower end of adriven shank (not shown).

In operation, during the forming of a hole in the ground by the bitcutter 9, the horizontally disposed cutter units 25 will graduallyincrease the diameter of the hole. The simplicity of my improved bitconstruction enables the parts to be readily and easily assembled ordisassembled, and furthermore, the bit will at all times be eilicientand reliable in its operation.

While I have shown the preferred embodiment of my invention, it is to beunderstood that various changes in the size, shape and arrangement ofparts may be resorted to, Without departing from the spirit of theinvention or the scope of the appended claims.

Having thus described my invention, What is claimed as new is:

1. In a drill bit, a sectional body, a cutter carried by the lower endthereof, a block secured between the sections of the body and formedwith a bore, a spindle extending through the bore, the outer end of thespindle projecting beyond the side of the body for disposition at rightangles thereto, and a cutter unit rotatably mounted on the outer end ofthe spindle.

2. In a drill bit, a sectional body, a cutter carried by the lower endthereof, a block socured between the sections of the body and formedwith a bore, a spindle extending through the bore, the outer end of thespindle projecting beyond the side of the body for disposition at rightangles thereto, and a tapered head formed on the outer projecting end ofthe spindle, a similar tapered socket mounted on said head for rotation,the inner end of the socket being open, means for securing the socketmember against displacement from the tapered head, and cutting teethformed on the outer face of the socket member.

3. In a drill bit of the class described, a secional body, the inneropposed faces of said sections being formed with cooperating cutoutportions, a block mounted within said cut-out portions, a cuttercarried by the lower end thereof, said block being formed with ahorizontally disposed bore, a spindle extending through said bore, theouter end of the spindle projecting beyond the side of the sec tionalbody, and a cutter unit rotatably mounted on the outer end of thespindle.

In testimony whereof I aliix my signature.

JAMES S. MONEILL.

